Estudio del movimiento apsidal en sistemas binarios masivos

FERRERO G.; GAMEN R.; FERNÁNDEZ LAJÚS E.

Tafí del Valle, Pcia. Tucumán

Jornada; Segundas Jornadas de Astrofísica Estelar; 2011

Asociación Argentina de Astronomía

In O+OB close binary systems, superior order momenta of the classical gravitational potential and general relativity effects produce a secular motion of the apsides. This phenomenon, together with theoretical stellar structure models, can be used to estimate absolute masses of the system components, even for non-eclipsing binaries. We are conducting a spectroscopic study of the eccentric close O+OB binaries in order to detect or confirm the existence of apsidal motion, determine its rate and calculate the absolute masses of the stars. In this work we describe the actual status of the project and present some preliminary results obtained for the stars i Ori A, HD 93205,HD 152248 and HD 165052.